51214387 has 16 divisors (see below), whose sum is σ = 63977472. Its totient is φ = 39980160.

The previous prime is 51214337. The next prime is 51214409. The reversal of 51214387 is 78341215.

51214387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51214387 - 2⁷ = 51214259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51214337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3253 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (3998592).

Almost surely, 2^51214387 is an apocalyptic number.

51214387 is a deficient number, since it is larger than the sum of its proper divisors (12763085).

51214387 is a wasteful number, since it uses less digits than its factorization.

51214387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13938.

The product of its digits is 6720, while the sum is 31.

The square root of 51214387 is about 7156.4227795736. The cubic root of 51214387 is about 371.3618839206.

The spelling of 51214387 in words is "fifty-one million, two hundred fourteen thousand, three hundred eighty-seven".